(A customer walks in with a cheap supermarket-branded laptop. She insists it’s only a tiny problem, but it turns out to be a malware-ridden horror show with no anti-virus software installed at all. I spend over 30 minutes cleaning it up with the customer standing behind my back. I recommend installing an anti-virus package, which the customer refuses. She then picks up her machine, and tries to walk out.)

Me: “Excuse me, aren’t you forgetting something?”

Customer: “…Huh?”

Me: “The service fee is 45 euros.”

Customer: “Oh, come on! The computer was already expensive, and now this?!”